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WILLIAM, L. WASHBURN, OF BROOKLYN, NEW 'YORK. Letters Patent No. 61,585, dated January 29, 1867.

IMPROVEMENT IN VENTILATORS FOR WINDOWS, due.

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Specification of certain Improvements in Ventilators for Dwellings, Cars, and other purposes, invented by WILLIAM L. WASHBURN, of Brooklyn, in the county of Kings, and State of New York.

The object of my invention is to furnish a cheap and reliable means for ventilating dwellings and other buildings, cars, vessels, &c., which shall exclude sudden gusts of wind au'd'protect those within from the direct action of the draught. It consists in the combination, with a stationary'or adjustable fra\ne,'ot two or more sets or pairs of swinging or flap-valves and flanged shelves combined, similar to those described in Letters Patent of'the United States granted to me on the 2d day of July, 1861, whereby a ventilator is produced which can be applied in any place or position where it is needed in any dwelling or other building, car, or vessel. It maybe put on the top of a window sash and made to slide up into a recess made for it in the wall above, or to fold inward or outward, or it may be made to fit into a casement in thesile or wall of a car or building and remain stationary. therein,'aud. an additional shutter or sash may be placed in front of or behind it, as may 'be desired. In the accompanying drawings 1 Figure 1 is an outside view of my improved ventilator.

Eigurefl is an inside viewof the same.

Figure 3 is a. vertical cross-section of the same.

A is the frame, which may be varied in form to adapt it for the place for which it is intended. Lt has, in the form shown, a rabbet running around the outer edge to adapt it tobe fitted into a casing. 13 Biare the valves, which arehung in the frame at their upper corners and swing'firoely thereon; and O C the flanged shelves which are fixed stationarily in said frame. e ,c are narrow strips of velvet, India rubber, or other suitable material, put on the flanges of the shelves C C to deaden the sound when the valves. B B are-blownviolently against them by the wind. The ventilator described can be made of any suitable metal or. wood, and any number of sets or pairs of the valves and shelves may be put into one frame to suit the nature of the case. It is peculiarly adapted for use in railroad. cars, though it can be advantageouslyemployed "in many other places. Used in cars, it will exclude the dust and cinders, as a gust or current of air strong enough to carry them into the car will close the valves, while on the other side of the car they will remain open. For the, same reason this ventilator isvery valuable in cities and other placeswhere much dust and dirt are liable to be blown about by the wind.

Having thus fully described. my invention, I claim- The combination, with a stationary or adjustable frame A, of two or more sets or pairs of swinging or flapvalves and flanged shelves, substantially as and for the purpose hereinabove specified. I

WILLIAM L. WASHBURN.

Witnesses:

H. JAMES Wes-201v,

B. H. SEATON. 

